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EMPLOYEE BENEFIT PLANS - Components of net periodic cost (benefit) (Details) - Retirement Income Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
EMPLOYEE BENEFIT PLANS
Interest cost	$ 58	$ 64	$ 174	$ 192
Expected return on plan assets	(73)	(117)	(219)	(352)
Amortization of net losses	24	22	72	66
Net periodic cost (benefit)	$ 9	$ (31)	$ 27	$ (94)

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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- Definition

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